A Root Density Tradeoff in an Okra-Assisted Subsurface Pipe Drainage System for Amelioration of Saline Soil
A Root Density Tradeoff in an Okra-Assisted Subsurface Pipe Drainage System for Amelioration of Saline Soil
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DOI：
10.3390/agronomy12040866
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
D. Fang;K. Guo;A. Ameen;Shichao Wang;J. Xie;Jintong Liu;Lipu Han
中科院分区：
文献类型：
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作者：
D. Fang;K. Guo;A. Ameen;Shichao Wang;J. Xie;Jintong Liu;Lipu Han
地下管道排水技术可有效改善我国北方沿海盐碱地。我们探索了秋葵（Abelmoschus esculentus L.）辅助地下管道排水系统，以提高水和盐的排放性能和效益。本研究通过模拟箱实验，研究地下管道排水排水排盐性能对黄秋葵根重密度（RWD）的响应。测定排水流量、土壤盐度和钠吸附率。结果表明，黄秋葵RWD影响了黄秋葵根系的垂直分布。具有适当RWD（约116 μg·cm−3）的秋葵可以显着增加累积排水流出量。秋葵适当的RWD（约136 μg·cm−3）可以显着提高脱盐效果。此外，黄秋葵的RWD还影响地下管道排水抑制土壤碱化的能力。上述结果表明，当黄秋葵RWD在116~136 μg·cm−3左右时，在我国北方沿海盐碱地种植黄秋葵并安装暗管排水控制排水，可有效提高排水排盐效果。采用地下管道排水改良滨海盐渍土时，适当选择种植秋葵密度，可提高效果和效益。
Subsurface pipe drainage technology can effectively improve coastal saline land in Northern China. We explored an okra (Abelmoschus esculentus L.)-assisted subsurface pipe drainage system to improve the water and salt discharge performance and benefits. In this study, the simulation box experiment was conducted to research the response of water and salt discharge performance in subsurface pipe drainage to okra root weight density (RWD). The drain outflow, soil salinity, and sodium adsorption ratio were determined. The results showed that okra RWD affected the vertical distribution of okra roots. Okra with an appropriate RWD (about 116 μg·cm−3) could significantly increase the cumulative drain outflow. Okra with an appropriate RWD (about 136 μg·cm−3) could significantly increase the desalting effect. Moreover, the RWD of okra also influenced the ability of subsurface pipe drainage to inhibit soil alkalization. The above results show that planting okra and installing subsurface pipe drainage to control drainage at the coastal saline land in Northern China can effectively improve the water and salt drainage effect when okra RWD is about 116–136 μg·cm−3. When using subsurface pipe drainage to improve coastal saline soils, planting okra with proper density may be an appropriate choice to improve the effect and benefit.